Step 1. Find a wall that gives you a clear shot into the room with bullet penetration. You just need a place where if you shot through the wall the opposing player would see it.

Step 2. Fire roughly half your magazine into the wall in a small concentrated area.

Step 3. Quickly move away from the area where you shot through the wall. It might also be a good idea to go prone or find some cover.

Step 4. Wait for your enemy to start firing back through the wall. Most people will shot back and try to use that small bullet pattern to pinpoint your location.

Step 5. The moment the opponent starts firing back through the wall sprint into your room and shot your opponent. They will be too busy to staring/shooting at the wall to camp the rooms doorway and see you. You can then take your time to set up a headshot or simply go for a nice Knife in the back.

This trick won’t always work, but it’s worth a try if all your other options are exhausted.

Flash Grenades – Have a one second fuse that will go off even if the grenade is in midair. This is a disadvantage for long tossing the grenade because it is totally ineffective if it explodes in mid air. The flash grenade has a longer range than the stun grenade, 200-800. It will only damage the enemy if it explodes right next to the target.

When it does explode the flash grenade emits a high piercing noise completely blinds the target for up to of 6 seconds depending on how close the the enemy was to the blast. Screenshot of flash grenades effects at right. The effected player still has full movement and weapon functions, they just can’t hear or see anything. This means the target can wildly spray fire until the hit indicator lights up, and use that hit indicator information to get a kill. The flashed target also retains full movement capabilities so they can move out of the way of any incoming grenades. This means a flashed enemy still poses a significant threat and can often escape unharmed.

Stun Grenades – Have a  minimum one second fuse with the requirement that the grenade must hit the ground before it explodes. Unlike the flash grenade effective long tosses with the stun grenade are possible because it only explodes after hitting the ground. The stun grenade has a slightly lower range than the flash grenade, 0-512 but much higher damage 1-40. The damage can not only get you kills but gives you valuable information; using the hit indicator you can tell whether or not a room is clear or has an enemy in it. This is impossible to do with the flash grenade unless it lands right next to the target.

The stun grenade emits a high piercing know and partially blinds the enemy just like a flash grenade. The blinding is much less severe though, such that you can still see well enough to identify targets. Screenshot of stun grenades effects above. More importantly the stun grenade significantly slows both your aiming and movement making it very difficult to run away from grenades or swing your weapon towards an enemy. This is crucial because it totally incapacitates your target. All you have to do to finish the kill is toss a grenade in there or do a quick strafe prone jump and open fire. The stunned enemy will be unable to move fast enough to aim at you or run away from the grenade. Combine this with the information gained from the hit indicator and it’s long tossing capabilities and the stun grenade is generally better than the flash grenade.

The bottom line: In general the stun grenade is superior to the flash grenade in Call of Duty 4 because it restricts enemy movement and provides valuable information via the hit indicator.